iphone - 如何将两个 UIBarButtonItem 添加到 UINavigationItem？

Question

我想在我的 UINavigationBar 上有两个 rightBarButtonItem。我怎样才能做到这一点？

Answer 1

您可以使用 UISegmentedControl使用两个按钮并将其配置为 momentary 属性设置为 YES。

这是在邮件应用程序中用于转到下一封/上一封邮件的内容。

更新

为了分配 UISegmentedControl] 1作为右键，您必须将其包装在 UIBarButtonItem 中(示例代码取自 NavBar sample application ):

- (void)viewDidLoad
{
    // "Segmented" control to the right
    UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:
                                                [NSArray arrayWithObjects:
                                                    [UIImage imageNamed:@"up.png"],
                                                    [UIImage imageNamed:@"down.png"],
                                                 nil]];
    [segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];
    segmentedControl.frame = CGRectMake(0, 0, 90, kCustomButtonHeight);
    segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
    segmentedControl.momentary = YES;

    UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];
    [segmentedControl release];

    self.navigationItem.rightBarButtonItem = segmentBarItem;
    [segmentBarItem release];
}